Thermostatic controller for gas water-heaters.



H. JARVIS.

THERMOSTATIC CONTROLLER FOR GAS wmn HEATERS.

APPLICATION FILED DEC. [3, H6- L286 ,012. Patented Nov. '26, 1918.

HARGLIO JARVIS, 03: TORONTO, QN'LA'RID, OANAJJA.

TIEiETEtILEGSTAIIC CONTROLLER FOR GAS VAKEER-I-IEATERE.

weenie,

Application filed December 13, 1916.

To all whom it may concern:

Be it known that .l, I-Lmonn Jr-xnvis, e snhj'ect of the King of (treat Britain, and resident of the 'ity of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful improvements in 'lhermostutie (lontrollers for Gas i interlleuters, as described in the following specification and illustrated in ihe accompanying d1 wings, that form part of the some.

The principal objects of the invention are to improve the device shown in my previous l'uiteil Shiites lutent No. 1,172,459 in such a,- nuinner us to absolutely prevent the possihility of the gee valve being opened slovvl;

I eml insuring :1 quick snap opening of the valve and a. consequent full How of gas to the burner.

A further cmect is to provide a simple menus for remiletin the mzwnetic 1111 u on D A PS the armature and thereby eilecting a saving in time consequent cost in manufacture.

The principal feature of the invention C(fllSlS'i S in the novel manner. of opening the valve controlli g the gas supply to the burner by 021' .ug' it to he engaged by a. thermostatically operated arm with e sharp impact at u point intermediate of the movement of said in er.

In the drewings,

Figure l is a sectional plan View of he device to which my im.

provement is ei'ipliedi Fig. 2 u eentrel longitudinal section of the le /ice shown in Fig. 1.

3 e transverse vertical section of the device taken through the center of the gas outlet.

Like numerals of reference indicate corresponding parts in eeeh figure.

Referring; to the ciruwinnjs, the casing 1 in which the gas control mechanism is arranged is provided with a thermostat 2 which extends into the water to be heated endthe interior of seid casing is connected ton suitable one supply through the pus sag 8.

A valve seat is arranged at the opening to the pipe 5 leedin irom the casing 1.

ii is 2 bracket briclg'm over the valve seat at having a central sleeve portion 7!.

The waive B which in pert s hericel shape rests upon the valve seat 4% an is pro vitieii with u stem 9 extending loosely Specification of Letters Patent. 33 ga fqy gii'fl N01,, 241, 1918.

Serial 1%. 13123223.

through said sleeve, :1 spiral spring 10 surrounding the stem and lower part of the sleeve, holding the valve to its seat.

The side arms of u horseshoe magnet 11 are located nt the sides of the casing and extend to or beyond the ends of the bracket 6.

The magnet armature 1:2 supported on the pivotal hrezilc joint arm 13 extends over the top of the bracket (5 and is provided with u hole 14: through vi 'hieh the upper end of the valve stem 9 extends, said stein being loose therein and having}; the look nuts 15 at the top adopted to he ei'ignged by the urnuiture in its upward n'mvement to lift the valve from its sent.

T he arm 18 is formed with e. break joint 16 intermediate of its length and the section carrying the ezruiu'un-i 12 is connected at its rear end to a. spring 'l'i" secured to the fusing. 'lh'e pull of the spring" 1! acts against the magnolia pull upon the armature and when the upward pressure of the thermostat 2 against the arm 13 is sufficient to overcome the magnetic mill the spring 17 then pulls the outer pivotal enti 18 of the arm 13 down with a quick snap. This action throws the armature l2 upwardly and it engages the nuts on the valve stem 9 thereby lifting the valve with. it quick snappy notion.

When the thermostat nets to lower the arm 13 the armature i2; nlleii clown with a quick snap nmgnet action and the velve is thus close-(i quickly.

In order to overcome the (iiilieulties in adjnstmentowing to the varying strength of pull oi? mngynets I plOVhlfi e pair of adjustin g: screws; 19 shrouded in the eerie of the armature 12. "heee screws are of brass and projecting below the n'mieturc they rest upon the side errus oi the mug'net and prevent the amnuture sticking. The screws 19 may he adjusted as desirecl to increase or decrease the grep between the armature until magnet and thus regulate the motion as desired. This feature obviates a lot oi fitting in the manufacture of the device and effects n. considerivhle sevinp; in e It will he i'irirlerstood. that as the valve stem is loose the valve; will sent itself under the action of the spring 13 and if there is any tenfieney for one side of the armature to sis valve, ma ms abiwwlume o;

wucfiinn valve i116 bmci 1%;

0 stem 00 s set 1162s in zhe m3 abin'ough mmsl le magma-13 piata with the nut fastened to the 3mm wave (she mam. r

Water heaters, tbs combination with a thenmostarisally @peraZe-d break joint arm having armature at its outer end and a magnei. adapted .30 attract said. armature, of a 'braoket extending aver the gas outlet a1- l'angerl beneath said. armaiure, a valve for closing; the gas outlet having its stem extending through said bracket and through said armature (L spirai spring: encircling said valve sfiem between the valve and bracket and. holding the valve to its seat, and an adjustubk: stop on ihe valve stem above the armature adapt-ed to be engaged by the :u'nmtum to raisethe vawe frmn its seat.

2. In a thermostatic controller for gas Water heat-01's, the combinatimx with a thermostatically Operated break jsint arm having an armature at its outer and and. a magnet haw 111g; lts P016 ends arranged to attract the ends- Gf said arnmture of nonmagnetic adjusting screws an'anged in the ends of said armatp'ze adapted 1E0 engage the pole; ends of the /map;net, uni a valve l00se1y connected to said armature and adapted to close the gas supply,

HABGLD JARVIS. 

